92 lines
2.6 KiB
Markdown
92 lines
2.6 KiB
Markdown
[](https://travis-ci.org/selfcontained/deap)
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[](https://coveralls.io/r/selfcontained/deap?branch=master)
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===
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[](http://ci.testling.com/selfcontained/deap)
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deap
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====
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extend and merge objects, deep or shallow, in javascript
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### installation
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```bash
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npm install deap
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```
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```javascript
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var deap = require('deap');
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```
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### browser usage
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**deap** assumes es5, so we recommend using an es5 shim for older browsers. [Browserify](https://github.com/substack/node-browserify) is also recommended as a means to use this module client-side, but other module loaders for browsers will work with **deap** as well if you shim it.
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### available functions
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+ deap() and deap.extend() - **deep extend**
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+ deap.merge() - **deep merge**
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+ deap.update() - **deep update**
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+ deap.extendShallow() - **shallow extend**
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+ deap.mergeShallow() - **shallow merge**
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+ deap.updateShallow() - **shallow update**
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+ deap.clone() - **deep clone**
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---
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### deap() and deap.extend()
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Deep extend. Copy all the properties from one object onto another, cloning objects deeply.
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Takes *n* number of arguments, modifies the first argument and returns it.
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```javascript
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var a = { name: 'Joe' };
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deap.extend(a, { age: 26 }); // returns: a => { name: 'Joe', age: 26 }
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deap.extend({}, someObj); // clone someObj
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```
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### deap.merge()
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Deep merge. Copy properties from one object to another, not replacing existing properties.
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Takes *n* number of arguments, modifies the first argument and returns it.
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```javascript
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var a = { name: 'Joe', address: { number: 1234 };
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deap.merge(a, { name: 'Jack', age: 26, phone: '555-555-5555', address: { number: 4321, street: 'University Blvd' });
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// returns: a => { name: 'Joe', age: 26, phone: '555-555-5555', address: { number: 1234, street: 'University Blvd' }}
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```
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### deap.update()
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Deep update. Fill an object's existing properties from another object.
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Takes *n* number of arguments, modifies the first argument and returns it.
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```javascript
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var a = { name: 'Joe', phone: '' };
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deap.update(a, { age: 26, phone: '555-555-5555' }); // returns: a => { name: 'Joe', phone: '555-555-5555' }
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```
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---
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## shallow only
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If you prefer a shallow-only instance of **deap** you can require it specifically
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```javascript
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var deap = require('deap/shallow');
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deap() && deap.extend(); // shallow extend
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deap.merge(); //shallow merge
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deap.update(); //shallow update
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deap.clone(); // deep clone
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```
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... the end
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